The IP Phone is on the Primary controller running Release 7.1 because of Nice Recording Software, the set fails over to the Secondary controller running Release 4.0 SP3. The set will download the new firmware from the 4.0 SP3 secondary controller, when it fails back to the Primary controller will it a: download the firmware from 7.1 or b: use the 4.0 firmware on the 7.1 controller or c: not work at all?